Also, can I get your opinion on this list which has been proving startlingly effective (currently 10-0; don't take this too seriously though since a lot of it is in casual + my current MMR is < 2000):
Francesca - powerful consistency tool
3x Vrihedd Officer - mandatory mulligan synergies. Also smooths the mulligan (see notes).
3x Elven Wardancer - bronze thinning. Has some consistency issues (see notes).
2x Vrihedd Dragoon - these are great in a long round but the way I play the deck, rounds tend not to go really long (see notes). They're also low tempo. Still good enough to include, but I doubt at 3x.
1x Quen Sign - mandatory with Swordmasters, Elven Mercenary target.
3x Dol Blathanna Swordmasters - extremely powerful cards, they regularly hit for 16+ points even without big handbuff support.
2x Vrihedd Vanguard - mostly mulligan synergies. He's an elf = receives buffs from Iorveth = boosts Vrihedd Officer's power more when mulliganing.
1x Elven Mercenary - digs for Quen. Sorta nice to have, since if I don't need anything else Francesca for Quen is common, but Quen's a spell so Francesca's boost goes to waste otherwise.
Roach - ST silvers are so bad I gotta run something. It's not like Roach is bad either, since getting out-tempoed early while I'm setting up the Iorveth combo is a potential problem.
Aelirenn - see above. Occasionally she works miracles when Toruviel flips (I didn't know that).
Toruviel - Isengrim target, also an Elf.
Ida - I was thinking of running Vrihedd Officers and thus freeing up a silver slot, but ST silvers are so bad I just left Ida here. It's not like I have bronze space either.
Ciaran - Locks are good in the current meta, although I wouldn't say they are necessary. I'd probably have run something else if ST silvers weren't so bad. At least he's an Elf for Iorveth, and has slight synergies with Ida into Fog.
Yaevinn - Mandatory faction spy. Quite a good one too, except he'd be better if he weren't an Elf (try to play him before Iorveth!).
Iorveth - core build-around card.
Renew - to reuse Iorveth. The value is staggering.
Isengrim - he provides massive tempo, especially since he is likely to out-tempo an opposing lock unit.
Muzzle - tech choice, not sure (see notes).
This arose after I ditched all the low-tempo cards that characterize the all-in Swordmaster deck. Making a 24-power Swordmaster is great, but not really that necessary. I gave up some of the flashiness of big Swordmasters to bring in mulligan synergies. The gameplan is to Iorveth something round 1 and then pass ASAP, especially if Renew is in hand. Francesca is typically played very early for this reason, to dig up Iorveth or Renew. In round 2, a mulligan on Wardancer can prevent a drypass, otherwise play it out and keep Swordmasters for round 3 as much as possible. The deck is OK with getting bled since the Swordmasters are such powerful win conditions. Renew Iorveth ASAP and then play with a super-boosted hand. The later turns can actually get pretty dull, since eventually the deck gets to the point where it ignores the opponent and just maximizes the points it can put out.
The deck is great at finding its power plays, and in the 10-game streak I played Iorveth twice in most games + usually got Isengrim onto the board too. Weaknesses are mulligan issues in 3rd round (see note on Elven Wardancer below) and possibly if people learn how to play against it. For example right now, if I go first, quite often I will lead with Yaevinn. That's because I want to get him out before Iorveth is played. I'll do this even if my opponent goes first, since I'm fine with winning down a card if Iorveth is also triggered. However if my opponent passes immediately after the Yaevinn I have trouble triggering Iorveth. That means I'll only be able to trigger Iorveth once, and Renew becomes useless. I actually had to mulligan it away one game.
Notes on individual cards:
Ida - if the round's going to last longer than 6 turns, Fog outdamages Overdose. It does turn on the opponent's weather clear, but right now, nobody is running single-row bronze weather clear and if the opposing mage uses Clear Skies then it's also not using its 12-point nuke and it balances out.
Vrihedd Officer - one nice thing to do with this card is to not mulligan Aelirenn, Wardancer, Toruviel, etc, buff them with Iorveth, and then mulligan them with Vrihedd Officer. When Isengrim eventually plays Toruviel this way, the opponent might be counting her as 14 points when she could be 15 or 16. Devious. Of course, they can also mulligan away cards that I don't want (e.g. Roach), but typically I save my mulligans each round to mulligan away Quen and Roach, reserving boosted units for the Officer mulligan.
Elven Wardancer - typically an auto-mulligan every round, but occasionally I leave her in hand to buff with Iorveth for a later round. It's not all roses for this card however. A major problem with the deck right now is, if I'm in round 3, every time I mulligan with Vrihedd Officer I also risk drawing a Wardancer (or another Officer). It can be mitigated to some extent by having another Vrihedd Officer / Francesca, but there's no guarantee. There was one game where my last three cards were Swordmaster x2 + Officer, and I had to mulligan away an 8-point Swordmaster because the Officer is embarrassing otherwise. Imagine if I had pulled a Wardancer with the mulligan! This is partly why I'm considering Saskia.
Muzzle - the biggest target for this card is Morkvarg; it also helps vs. consume Nekkers, not-very-boosted Dragoons, etc. I am not sure it is the best choice however.
Cards I'm thinking of:
Saskia - alleviates the mulligan issue, but she's not an elf. Another problem is I could conceivably run out of bronze cards to play. Having to play a Vanguard isn't the end of the world, but it's still something better avoided. She is potentially a value target for Renew if Iorveth has no targets (Isengrim is a one-use gold), but it's unlikely she will be played early enough to be Renewed.
Dorregaray - it can consume Iorveth for Renew, which lets me push a round without having to pass early, but he's not an elf. If run with Saskia it could make for some funny combos: who would have thought that Wyvern can be the Dorregaray unit of choice (after Ekimmara)? Bringing out Drowner is also a potential combo with Ida, but it won't be a common one since Ida applying Fog is rare.
Decoy - it's annoying when Toruviel gets locked. Decoy fixes that, and if Dorregaray is included as well it might have enough targets to be good (Ida & Dorregaray) even if Toruviel isn't locked. Annoyingly though, bringing Ida back into hand also resets her (= loses all Iorveth / Dragoon buffs).
Vrihedd Brigade - single-row bronze clear is better than Clear Skies if a deck can afford it. This deck should be able to, since if they are not relevant they can be mulliganed away with Officers. It actually sounds really good except 1) I don't know what bronzes to cut and 2) if I run these, I'd drop Ida, but ST silvers are so bad I don't know what to replace her with.
Dol Blathanna Archer - helps push units into Iorveth kill range. Of course I don't want that to actually happen, but it's possible. Can also break Quen shields so my Swordmasters can get a big hit in.
Ithlinne - Ithlinne can potentially buff multiple units with Quen, which is obviously stronger than just buffing Swordmasters. Other buffed units also increase the power on Vrihedd Officer. On the other hand, losing Muzzle means I must have Mardroeme, since otherwise Nekkers are a pain.
Any thoughts, comments, etc? I would not call the deck tuned - it's actually the exact 25 I threw together after ditching the handbuff cards - but the core is proving very strong.